Plain-language ABA terminology.
The vocabulary that shows up in session notes, treatment plans, FBAs, and the BACB exam — defined in clear language with practical examples. Useful for new RBTs, students preparing for certification, and families trying to understand a child's treatment plan.
Foundations
12 termsApplied Behavior Analysis
ABAThe science of applying learning principles to socially significant behavior — most commonly used in autism services.
Automatic Reinforcement
Reinforcement produced directly by the behavior itself, without another person delivering it.
Discriminative Stimulus
SDA stimulus in the presence of which a behavior has been reinforced, signaling reinforcement is available.
Motivating Operation
MOEnvironmental variable that alters the value of a reinforcer and the behavior that produces it.
Negative Reinforcement
Removing or postponing an aversive stimulus following a behavior, which increases that behavior.
Operant Conditioning
Learning process in which behavior is shaped by its consequences — reinforcement and punishment.
Premack Principle
grandma's ruleUsing a high-probability behavior as reinforcement for a low-probability behavior.
Punishment
Any consequence that decreases the future frequency of the behavior it follows.
Reinforcement
Any consequence that increases the future frequency of the behavior it follows.
Respondent Conditioning
classical conditioningLearning process in which a neutral stimulus comes to elicit a reflexive response through pairing.
Stimulus Control
When the rate or form of a behavior is reliably influenced by the presence of a particular stimulus.
Three-Term Contingency
ABC contingencyThe basic unit of analysis in ABA: antecedent, behavior, and consequence.
Roles
3 termsBoard Certified Assistant Behavior Analyst
BCaBABachelor's-level ABA credential authorized to deliver and supervise services under BCBA oversight.
Board Certified Behavior Analyst
BCBAMaster's-level ABA credential for independent case ownership, supervision, and treatment plan authorship.
Registered Behavior Technician
RBTParaprofessional credential for direct ABA implementation under BCaBA or BCBA supervision.
Measurement
12 termsABC data
antecedent-behavior-consequenceDescriptive recording of what happens before a behavior, the behavior itself, and what happens after.
Baseline
Measurement of a behavior before intervention, used as the comparison for treatment effects.
Duration Recording
Measuring the total elapsed time a behavior occurs within an observation period.
Frequency Recording
event recordingCounting each occurrence of a behavior within an observation period.
Interobserver Agreement
IOAPercentage of agreement between two independent observers scoring the same behavior.
Latency Recording
Measuring the time between a cue and the start of a behavior.
Momentary Time Sampling
MTSScoring whether a behavior is occurring at the exact moment an interval ends.
Operational Definition
Definition of a behavior in observable, measurable terms with examples and non-examples.
Partial-Interval Recording
Scoring a behavior as occurring if it happens at any point during an interval.
Scatterplot
A grid recording when a behavior occurs across times of day to reveal temporal patterns.
Trials to Criterion
The number of trials a learner needs to reach a mastery criterion for a skill.
Whole-Interval Recording
Scoring a behavior as occurring only if it happens for the entire interval.
Procedures
23 termsBehavior Intervention Plan
BIPWritten plan that prescribes antecedent strategies, replacement behaviors, and response procedures for a target behavior.
Behavioral Momentum
high-probability request sequenceDelivering several easy requests before a difficult one to increase compliance.
Chaining
forward chainingTeaching a behavior chain by linking the individual steps of a task analysis.
Differential Reinforcement
DRAFamily of procedures that reinforce one response class while withholding reinforcement for another.
Discrete Trial Training
DTTHighly structured teaching format with clear instruction, prompted response, and immediate consequence.
Errorless Teaching
Teaching method that prompts the correct response immediately to prevent error patterns.
Extinction
Discontinuing the reinforcement that previously maintained a behavior.
Extinction Burst
A temporary increase in a behavior's frequency, intensity, or duration when extinction begins.
Functional Communication Training
FCTTeaching a communication response that serves the same function as a problem behavior.
Generalization
Performance of a learned response under conditions different from those in training.
Imitation
motor imitationReplicating a modeled behavior; a foundational learner skill that enables observational learning.
Incidental Teaching
A naturalistic procedure that uses the learner's initiations as teaching opportunities.
Maintenance
Continued performance of a previously mastered skill after instruction has thinned or stopped.
Natural Environment Teaching
NETTeaching that embeds learning targets into the client's preferred activities and routines.
Noncontingent Reinforcement
NCRDelivering a reinforcer on a fixed schedule regardless of behavior, to reduce motivation for problem behavior.
Pairing
Process of associating yourself or the environment with reinforcement before placing demands.
Prompting
prompt fadingSupplementary cues that occasion a correct response, faded systematically over time.
Response Cost
Removing a specified amount of reinforcer contingent on problem behavior.
Shaping
Reinforcing successive approximations toward a target behavior.
Task Analysis
Breaking a complex skill into a sequence of smaller, teachable steps.
Time-Out
time-out from reinforcementRemoving access to reinforcement for a brief period contingent on problem behavior.
Token Economy
Reinforcement system in which conditioned reinforcers are exchanged for backup reinforcers.
Video Modeling
Teaching a skill by having the learner watch a video of the behavior performed correctly.
Verbal Behavior
5 termsEchoic
Verbal operant where the response duplicates the verbal stimulus — vocal imitation.
Intraverbal
Verbal operant controlled by other verbal behavior without point-to-point correspondence — conversation.
Listener Responding
receptive languageResponding appropriately to the verbal behavior of others — following instructions and selecting named items.
Mand
Verbal operant under the control of motivating operations — the technical term for a request.
Tact
Verbal operant under the control of a non-verbal stimulus — the technical term for labeling.
Assessment
6 termsABLLS-R
Assessment of Basic Language and Learning SkillsA criterion-referenced assessment and curriculum guide covering language, academic, self-help, and motor skills.
Functional Analysis
FAExperimental method for confirming the function of a behavior by manipulating conditions.
Functional Behavior Assessment
FBAProcess for identifying the function of a target behavior using indirect, descriptive, and experimental methods.
Preference Assessment
MSWOA structured procedure for identifying items or activities likely to function as reinforcers.
Social Validity
The extent to which an intervention's goals, procedures, and outcomes are acceptable and meaningful to stakeholders.
VB-MAPP
Verbal Behavior Milestones Assessment and Placement ProgramA criterion-referenced assessment of language and learning milestones based on Skinner's analysis of verbal behavior.
Documentation
9 termsCPT 97151
behavior identification assessmentCPT code for behavior identification assessment — the BCBA's assessment and treatment-plan development time, billed in 15-minute units.
CPT 97153
adaptive behavior treatment by protocolDirect ABA treatment delivered by a technician under a written protocol, billed in 15-minute units.
CPT 97155
adaptive behavior treatment with protocol modificationCPT code for protocol modification — the BCBA adjusting the treatment protocol, often while directing a technician.
CPT 97156
family adaptive behavior treatment guidanceCPT code for family and caregiver training — guiding caregivers to implement strategies, billed in 15-minute units.
Medical Necessity
medically necessaryThe payer standard that a service is reasonable and necessary to address a diagnosed condition.
Progress Report
progress summaryA periodic report summarizing progress on each goal to support continued authorization.
SOAP Note
Documentation format with Subjective, Objective, Assessment, and Plan sections.
Treatment Integrity
procedural fidelityThe degree to which an intervention is implemented as designed.
Treatment Plan
ABA treatment planThe written clinical plan defining a client's goals, procedures, and measurement for an authorization period.
Compliance
5 termsBusiness Associate Agreement
BAAA HIPAA-required contract between a covered entity and a vendor that handles protected health information.
Clawback
recoupmentA payer's recovery of money already paid for claims later found unsupported by documentation.
HIPAA
Health Insurance Portability and Accountability ActFederal law setting standards for the privacy and security of protected health information.
Prior Authorization
preauthorizationPayer approval that must be obtained before ABA services are delivered and reimbursed.
Protected Health Information
PHIIndividually identifiable health information protected under HIPAA.
Guides that put these terms to work.
Definitions are the start. These walk through how the terminology shows up in real ABA documentation.
- Clinical documentation
How to write an ABA session note (RBT + BCBA examples)
Session notes are where your clinical work becomes billable. Here is every element payers expect, with worked RBT and BCBA examples.
- Clinical documentation
Functional behavior assessment (FBA): the practical guide
The FBA is the backbone of every good treatment plan. Here is how to run one that actually changes what you do next.
- Clinical documentation
Writing a behavior intervention plan (BIP) that actually works
A good BIP is readable in five minutes and implementable with zero guesswork. Here is the structure to hit both at once.

